Visualize the "profile" layer and activate it. The volume of the wheel will be created in this layer. Set off the "prism" layer in order to make the selection of the entities easier.
In the Copy window, choose Translation and Surfaces. A translation of 10 units will be made. To do this, enter two points that define a vector for this translation, for example (0, 0, 0) and (0, 0, -10).
Choose the option Do Extrude Volumes from the Copy window. The volume that is defined by the translation will be created.
Make sure that the Maintain Layers option is not checked, hence the new entities created will be placed in the layer to use; otherwise, the new entities are copied to the same layers as their originals
Click Select and select the surface of the wheel. Press ESC.
Select the two layers and click them On so that they are visible.
Choose Render->Flat from the mouse menu to visualize a more realistic version of the model.

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